US5740874A - Cutting elements for rotary drill bits - Google Patents
Cutting elements for rotary drill bits Download PDFInfo
- Publication number
- US5740874A US5740874A US08/635,110 US63511096A US5740874A US 5740874 A US5740874 A US 5740874A US 63511096 A US63511096 A US 63511096A US 5740874 A US5740874 A US 5740874A
- Authority
- US
- United States
- Prior art keywords
- peripheral surface
- cutting element
- substrate
- chamfer
- cutting edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 79
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 230000007704 transition Effects 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 28
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 230000000875 corresponding effect Effects 0.000 claims 3
- 229910003460 diamond Inorganic materials 0.000 abstract description 9
- 239000010432 diamond Substances 0.000 abstract description 9
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical group [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004901 spalling Methods 0.000 abstract description 5
- 238000005755 formation reaction Methods 0.000 description 8
- 238000005553 drilling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
- E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
- E21B10/5673—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a non planar or non circular cutting face
Definitions
- the invention relates to cutting elements for rotary drill bits and particularly to preform cutting elements for use in rotary drag-type drill bits for ailing or coring holes in subsurface formations.
- the preform elements are of the kind comprising a facing table of superhard material having a front face, a peripheral surface, and a rear surface bonded to a substrate of material which is less hard than the superhard material.
- the facing table is usually formed from polycrystalline diamond, although other superhard materials are available, such as cubic boron nitride.
- the substrate of less hard material is often formed from cemented tungsten carbide, and the facing table and substrate are bonded together during formation of the element in a high pressure, high temperature forming press. This forming process is well known and will not be described in detail.
- Each preform cutting element may be mounted on a carrier in the form of a generally cylindrical stud or post received in a socket in the body of the drill bit.
- the carrier is often formed from cemented tungsten carbide, the rear surface of the substrate being brazed to a surface on the carrier, for example by a process known as "LS bonding".
- the substrate itself may be of sufficient thickness to provide, in effect, a cylindrical stud which is sufficiently long to be directly received in a socket in the bit body, without being brazed to a carrier.
- the bit body itself may be machined from metal, usually steel, or may be molded using a powder metallurgy process.
- the operative end face of the bit body is formed with a number of blades radiating from the central area of the bit, the blades carrying cutting elements spaced apart along the length thereof.
- the bit also has a gauge section including kickers which contact walls of the borehole to stabilize the bit in the borehole. It is common practice to mount on the bit body, in the intermediate region where the kickers meet the blades, so-called gauge cutters the purpose of which is to cut and form the side walls of the borehole as the cutting elements on the blades cut into the bottom of the borehole and the drill bit progresses downwardly.
- the cutting elements mounted on the blades on the end face of the bit body are commonly initially circular so as to provide a part-circular cutting edge to engage the formation at the bottom of the borehole.
- Gauge cutters commonly have a substantially straight cutting edge which, in use, extends generally parallel to the longitudinal rotational axis of the drill bit so as to cut the side walls of a cylindrical borehole.
- the present invention sets out to provide a novel form of preform cutting element, particularly suitable for use as a gauge cutter, which may be less susceptible than prior art gauge cutters to such spalling and other forms of damage.
- a preform cutting element for a rotary drag-type drill bit including a facing table of superhard material having a front face, a peripheral surface, and a rear surface bonded to a substrate of a material which is less hard than the superhard material, the peripheral surface of the cutting element including a substantially straight cutting edge having at opposite ends thereof junctions with the remainder of said peripheral surface, at least one of said junctions being formed with a chamfer which provides a transition between the end of the cutting edge and the adjacent portion of the remainder of the peripheral surface of the cutting element.
- both junctions may be chamfered.
- said transition chamfer may be angled, preferably the chamfer is smoothly curved to provide a continuous transition between the end of the cutting edge and the adjacent portion of the remainder of the peripheral surface.
- the chamfer may be in the form of a part-circular arc, opposite ends of which are substantially tangential to the cutting edge and the remainder of the peripheral surface respectively.
- the arcs may be of the same, or different, radii.
- the chamfering of one or both junctions between the cutting edge and the remainder of the peripheral surface may reduce the high contact loading, both steady state and impact loads, which may occur at these locations, and thus reduce the spalling or other damage which may be initiated or caused by such loads.
- the remainder of the peripheral surface of the cutting element is part-circular.
- Said part-circular portion of the peripheral surface preferably has an angular extent which is greater than 180, for example it may be in the range of 210-270.
- the ratio of the radius of curvature of the chamfer to the radius of curvature of the peripheral surface may be in the range of 1:1.4 to 1:1.8.
- the radius of curvature of the peripheral surface is 6.5 mm
- the radius of curvature of the chamfer may be about 4 mm
- the radius of curvature of the peripheral surface is 9.5 mm
- the radius of curvature of the chamfer may be about 6.5 mm. Cutters of 4 mm and 2.5 mm radius are also used, and the invention is applicable to cutters of any size.
- FIG. 1 is a side elevation of a typical drag-type drill bit in which cutting element according to the present invention may be used.
- FIG. 2 is an end elevation of the drill bit shown in FIG. 1.
- FIG. 3 is a plan view of a prior art gauge cutter used in such drill bit.
- FIG. 4 is a diagrammatic section through the prior art gauge cutter of FIG. 3.
- FIG. 5 is a plan view of a gauge cutter in accordance with the present invention.
- FIG. 6 is a diagrammatic section through the gauge cutter of FIG. 5.
- FIG. 7 is a plan view of a further form of gauge cutter in accordance with the invention.
- FIG. 8 is a side view of the cutter of FIG. 7.
- FIGS. 1 and 2 show a typical full bore drag bit of a kind to which the cutting elements of the present invention are applicable.
- the bit body 10 is machined from steel and has a shank formed with an externally threaded tapered pin 11 at one end for connection to the drill string.
- the operative end face 12 of the bit body is formed with a number of blades 13 radiating from the central area of the bit, and the blades carry cutter assemblies 14 spaced apart along the length thereof.
- the bit has a gauge section including kickers 16 which contact the walls of the borehole to stabilize the bit in the borehole.
- a central passage (not shown) in the bit and shank delivers drilling fluid through nozzles 17 in the end face 12 in known manner.
- Each cutter assembly 14 comprises a preform cutting element 18 mounted on a carrier 19 in the form of a post which is located in a socket in the bit body.
- Each preform cutting element is the form of a tablet comprising a facing table of superhard material, usually polycrystalline diamond, bonded to a substrate which is normally of cemented tungsten carbide. The rear surface of the substrate is bonded, for example by LS bonding, to a suitably orientated surface on the post 19.
- each gauge cutter normally comprises a facing table 22 of polycrystalline diamond or other superhard material bonded to a substrate 23 of a less hard material such as cemented tungsten carbide.
- the gauge cutter has a substantially straight cutting edge 24, the remainder of the peripheral surface 25 of the cutting element being part-circular. In use the gauge cutter is orientated on the bit body, in the intermediate region 20, so that the straight cutting edge 24 extends generally parallel to the central longitudinal rotational axis of the drill bit and therefore forms the cylindrical side walls of the borehole as drilling progresses.
- junctions between the opposite ends of the straight cutting edge 24 and the rest of the peripheral surface 25 of the cutting element are sharply angled, as indicated at 26 in FIG. 3. It is believed that the sharp angling of these junctions can lead to stress concentrations at the junctions, when the drill bit is in use, both as a result of steady state loads and also as a result of impact loads of short duration. It is believed that this stress concentration can initiate spalling and other forms of damage to the cutting element resulting in loss of cutting efficiency, or at worst failure, of the cutting element.
- FIGS. 5 and 6 show one improved form of gauge cutting element according to the present invention.
- the overall shape of the gauge cutting element is generally similar to the prior art arrangement in that it comprises a substantially straight cutting edge 27 and the rest of the peripheral surface 28 of the cutting element is part-circular.
- the junctions 29 between the opposite ends of the straight cutting edge and the remainder of the peripheral surface 28 of the cutting element are both chamfered to provide a gradual transition between the ends of the cutting edge and the peripheral surface so as to reduce stress concentrations in this region.
- the chamfer is in the form of a part-circular arc.
- the radius of curvature r of the chamfer 29 may be about 6.5 mm.
- the radius of curvature r of the chamfer may be about 4 mm. It will be seen that the ends of the arcuate chamfer are tangential to the cutting edge 27 and the remainder of the peripheral surface 28 respectively.
- the angular extent of the peripheral surface 28 of the cutting element is greater than 180, and may for example be in the range of 210-270.
- both junctions being chamfered, as shown, only one of the junctions may be chamfered. This is preferably the junction which is lowermost when the bit is drilling downwardly, since this is the junction which is most subject to impact and damage.
- the advantage of chamfering only one of the junctions is that it causes less reduction in the length of the straight cutting edge.
- the cutting element comprises a facing table 30 of polycrystalline diamond, or other superhard material, bonded to a substrate 31 of less hard material, such as cemented tungsten carbide.
- chamfers 29 are preferably in the form of part-circular arcs, other smoothly curved arrangements may provide similar advantage. Some advantage may also be given by chamfers which are not smoothly curved, for example the junctions may be provided with one or more angled chamfers, but in this case the reduction in stress concentration may be less.
- the part-circular configuration of the rest of the peripheral surface of the cutting element is shown by way of example only, and it will be appreciated that other shapes of cutting element may be employed.
- the cutting edge 27 and chamfers 29 may be formed by shaping an initially circular cutting element.
- the shaping may, for example, be effected by grinding, EDM or other suitable shaping process.
- the cutting element may be manufactured to the required shape ab initio in the high pressure, high temperature forming process.
- the diamond layer 30, and the substrate 31 may also be chamfered as viewed in cross-section, the chamfer being tangential to the surface of the formation which the cutter engages, so that the part of the cutter rearwards of the cutting edge serves as a buttress to bear some of the radial loads applied to the cutters and drill bit.
- the cutter comprises a facing table 32 of polycrystalline diamond bonded to a cylindrical substrate 33 of cemented tungsten carbide.
- the substrate 33 is of sufficient axial length that it may be directly mounted in a socket in the bit body and does not require to be brazed to a carrier as is the case with thinner cutters.
- the diamond facing table 32 is beveled round its periphery as indicated at 34.
- the bevel 34 is frusto-conical, but it could equally well be radiused as viewed in cross-section.
- the cutter has a substantially straight cutting edge 35.
- the substrate 33 is circular in cross section and the straight cutting edge 35 is formed by forming a flat chamfer 36 across one side of the substrate 33 adjacent the facing table 32.
- the angle of the chamfer 36 is such that when the cutter is mounted in the appropriate orientation in the gauge section of the drill bit, the chamfer 36 is substantially tangential to the surrounding formation in the wall of the borehole so that the chamfer portion provides an increased area to absorb lateral impact loads due to engagement of the cutter with the formation.
- the chamfer 36 is shown as flat, it might also be slightly curved to the overall radius of the drill bit, as it extends away from the straight edge, so as to be concentric with the surrounding formation.
- the junction 37 between one end of the straight cutting edge 35 and the remainder of the peripheral surface 38 of the cutter is chamfered, in the form of a part-circular arc, to provide a gradual transition between the end of the cutting edge and the peripheral surface so as to reduce stress concentrations in this region.
- the radius of curvature of the chamfer 37 may be 3.8 mm.
- the chamfer junction 37 is disposed lowermost when the bit is drilling downwardly.
- a buffer or transition layer may be provided between the superhard facing table and the substrate.
- the transition layer may comprise a material the critical properties of which are intermediate the properties of the materials of the facing table and the substrate.
- the interface between the facing table and the substrate, the interface between the facing table and the transition layer, and/or the interface between the transition layer and the substrate may be configured and non-planar to enhance the bonding between the layers.
Abstract
Description
Claims (51)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9508892 | 1995-05-02 | ||
GBGB9508892.8A GB9508892D0 (en) | 1995-05-02 | 1995-05-02 | Improvements in or relating to cutting elements for rotary drill bits |
Publications (1)
Publication Number | Publication Date |
---|---|
US5740874A true US5740874A (en) | 1998-04-21 |
Family
ID=10773844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/635,110 Expired - Fee Related US5740874A (en) | 1995-05-02 | 1996-04-19 | Cutting elements for rotary drill bits |
Country Status (3)
Country | Link |
---|---|
US (1) | US5740874A (en) |
EP (1) | EP0741228A3 (en) |
GB (1) | GB9508892D0 (en) |
Cited By (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5950745A (en) * | 1997-08-18 | 1999-09-14 | Sandvik Ab | Diamond-coated button insert for drilling |
US6009963A (en) * | 1997-01-14 | 2000-01-04 | Baker Hughes Incorporated | Superabrasive cutting element with enhanced stiffness, thermal conductivity and cutting efficiency |
US6065554A (en) * | 1996-10-11 | 2000-05-23 | Camco Drilling Group Limited | Preform cutting elements for rotary drill bits |
US6302223B1 (en) | 1999-10-06 | 2001-10-16 | Baker Hughes Incorporated | Rotary drag bit with enhanced hydraulic and stabilization characteristics |
US6564886B1 (en) * | 1996-09-25 | 2003-05-20 | Smith International, Inc. | Drill bit with rows of cutters mounted to present a serrated cutting edge |
US6604588B2 (en) * | 2001-09-28 | 2003-08-12 | Smith International, Inc. | Gage trimmers and bit incorporating the same |
US20050082093A1 (en) * | 2003-08-21 | 2005-04-21 | Keshavan Madapusi K. | Multiple diameter cutting elements and bits incorporating the same |
US20090057031A1 (en) * | 2007-08-27 | 2009-03-05 | Patel Suresh G | Chamfered edge gage cutters, drill bits so equipped, and methods of cutter manufacture |
US20090096057A1 (en) * | 2007-10-16 | 2009-04-16 | Hynix Semiconductor Inc. | Semiconductor device and method for fabricating the same |
US20100059287A1 (en) * | 2008-09-05 | 2010-03-11 | Smith International, Inc. | Cutter geometry for high rop applications |
US20100326742A1 (en) * | 2009-06-25 | 2010-12-30 | Baker Hughes Incorporated | Drill bit for use in drilling subterranean formations |
US20110023377A1 (en) * | 2009-07-27 | 2011-02-03 | Baker Hughes Incorporated | Abrasive article and method of forming |
US20110031031A1 (en) * | 2009-07-08 | 2011-02-10 | Baker Hughes Incorporated | Cutting element for a drill bit used in drilling subterranean formations |
US8757299B2 (en) | 2009-07-08 | 2014-06-24 | Baker Hughes Incorporated | Cutting element and method of forming thereof |
US8807247B2 (en) | 2011-06-21 | 2014-08-19 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and methods of forming such cutting elements for earth-boring tools |
US9187962B2 (en) | 2011-04-26 | 2015-11-17 | Smith International, Inc. | Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s) |
US9623542B1 (en) | 2006-10-10 | 2017-04-18 | Us Synthetic Corporation | Methods of making a polycrystalline diamond compact including a polycrystalline diamond table with a thermally-stable region having at least one low-carbon-solubility material |
US9643293B1 (en) | 2008-03-03 | 2017-05-09 | Us Synthetic Corporation | Methods of fabricating a polycrystalline diamond body with a sintering aid/infiltrant at least saturated with non-diamond carbon and resultant products such as compacts |
US9663994B2 (en) | 2006-11-20 | 2017-05-30 | Us Synthetic Corporation | Polycrystalline diamond compact |
WO2017106488A1 (en) * | 2015-12-18 | 2017-06-22 | Baker Hughes Incorporated | Cutting elements, earth-boring tools including cutting elements, and methods of forming cutting elements |
US9739097B2 (en) | 2011-04-26 | 2017-08-22 | Smith International, Inc. | Polycrystalline diamond compact cutters with conic shaped end |
US9808910B2 (en) | 2006-11-20 | 2017-11-07 | Us Synthetic Corporation | Polycrystalline diamond compacts |
US9951566B1 (en) | 2006-10-10 | 2018-04-24 | Us Synthetic Corporation | Superabrasive elements, methods of manufacturing, and drill bits including same |
US10155301B1 (en) | 2011-02-15 | 2018-12-18 | Us Synthetic Corporation | Methods of manufacturing a polycrystalline diamond compact including a polycrystalline diamond table containing aluminum carbide therein |
US10301882B2 (en) | 2010-12-07 | 2019-05-28 | Us Synthetic Corporation | Polycrystalline diamond compacts |
US10641046B2 (en) | 2018-01-03 | 2020-05-05 | Baker Hughes, A Ge Company, Llc | Cutting elements with geometries to better maintain aggressiveness and related earth-boring tools and methods |
WO2020117350A1 (en) * | 2018-12-06 | 2020-06-11 | Halliburton Energy Services, Inc. | Inner cutter for drilling |
USD911399S1 (en) | 2018-12-06 | 2021-02-23 | Halliburton Energy Services, Inc. | Innermost cutter for a fixed-cutter drill bit |
CN112943105A (en) * | 2019-12-10 | 2021-06-11 | 成都海锐能源科技有限公司 | Wide-edge cutting tooth, PDC drill bit and tooth arrangement method |
US20220003047A1 (en) * | 2018-11-07 | 2022-01-06 | Halliburton Energy Services, Inc. | Fixed-cutter drill bits with reduced cutting arc length on innermost cutter |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9717505D0 (en) * | 1997-08-20 | 1997-10-22 | Camco Int Uk Ltd | Improvements in or relating to cutting structures for rotary drill bits |
GB2506901B (en) * | 2012-10-11 | 2019-10-23 | Halliburton Energy Services Inc | Drill bit apparatus to control torque on bit |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4221270A (en) * | 1978-12-18 | 1980-09-09 | Smith International, Inc. | Drag bit |
US4705122A (en) * | 1985-01-15 | 1987-11-10 | Nl Petroleum Products Limited | Cutter assemblies for rotary drill bits |
US4724913A (en) * | 1983-02-18 | 1988-02-16 | Strata Bit Corporation | Drill bit and improved cutting element |
GB2211872A (en) * | 1987-11-03 | 1989-07-12 | Reed Tool Co | Improvements in or relating to cutter assemblies for rotary drill bits |
US5379853A (en) * | 1993-09-20 | 1995-01-10 | Smith International, Inc. | Diamond drag bit cutting elements |
US5383527A (en) * | 1993-09-15 | 1995-01-24 | Smith International, Inc. | Asymmetrical PDC cutter |
US5437343A (en) * | 1992-06-05 | 1995-08-01 | Baker Hughes Incorporated | Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor |
US5469927A (en) * | 1992-12-10 | 1995-11-28 | Camco International Inc. | Cutting elements for rotary drill bits |
GB2294069A (en) * | 1994-10-15 | 1996-04-17 | Camco Drilling Group Ltd | Rotary drill bits |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4682663A (en) * | 1986-02-18 | 1987-07-28 | Reed Tool Company | Mounting means for cutting elements in drag type rotary drill bit |
-
1995
- 1995-05-02 GB GBGB9508892.8A patent/GB9508892D0/en active Pending
-
1996
- 1996-04-19 EP EP96302741A patent/EP0741228A3/en not_active Withdrawn
- 1996-04-19 US US08/635,110 patent/US5740874A/en not_active Expired - Fee Related
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4221270A (en) * | 1978-12-18 | 1980-09-09 | Smith International, Inc. | Drag bit |
US4724913A (en) * | 1983-02-18 | 1988-02-16 | Strata Bit Corporation | Drill bit and improved cutting element |
US4705122A (en) * | 1985-01-15 | 1987-11-10 | Nl Petroleum Products Limited | Cutter assemblies for rotary drill bits |
GB2211872A (en) * | 1987-11-03 | 1989-07-12 | Reed Tool Co | Improvements in or relating to cutter assemblies for rotary drill bits |
US5437343A (en) * | 1992-06-05 | 1995-08-01 | Baker Hughes Incorporated | Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor |
US5469927A (en) * | 1992-12-10 | 1995-11-28 | Camco International Inc. | Cutting elements for rotary drill bits |
US5383527A (en) * | 1993-09-15 | 1995-01-24 | Smith International, Inc. | Asymmetrical PDC cutter |
US5379853A (en) * | 1993-09-20 | 1995-01-10 | Smith International, Inc. | Diamond drag bit cutting elements |
GB2294069A (en) * | 1994-10-15 | 1996-04-17 | Camco Drilling Group Ltd | Rotary drill bits |
Cited By (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6564886B1 (en) * | 1996-09-25 | 2003-05-20 | Smith International, Inc. | Drill bit with rows of cutters mounted to present a serrated cutting edge |
US6065554A (en) * | 1996-10-11 | 2000-05-23 | Camco Drilling Group Limited | Preform cutting elements for rotary drill bits |
US6009963A (en) * | 1997-01-14 | 2000-01-04 | Baker Hughes Incorporated | Superabrasive cutting element with enhanced stiffness, thermal conductivity and cutting efficiency |
US5950745A (en) * | 1997-08-18 | 1999-09-14 | Sandvik Ab | Diamond-coated button insert for drilling |
US6302223B1 (en) | 1999-10-06 | 2001-10-16 | Baker Hughes Incorporated | Rotary drag bit with enhanced hydraulic and stabilization characteristics |
US6604588B2 (en) * | 2001-09-28 | 2003-08-12 | Smith International, Inc. | Gage trimmers and bit incorporating the same |
US20050082093A1 (en) * | 2003-08-21 | 2005-04-21 | Keshavan Madapusi K. | Multiple diameter cutting elements and bits incorporating the same |
US7461709B2 (en) | 2003-08-21 | 2008-12-09 | Smith International, Inc. | Multiple diameter cutting elements and bits incorporating the same |
US9623542B1 (en) | 2006-10-10 | 2017-04-18 | Us Synthetic Corporation | Methods of making a polycrystalline diamond compact including a polycrystalline diamond table with a thermally-stable region having at least one low-carbon-solubility material |
US9951566B1 (en) | 2006-10-10 | 2018-04-24 | Us Synthetic Corporation | Superabrasive elements, methods of manufacturing, and drill bits including same |
US9663994B2 (en) | 2006-11-20 | 2017-05-30 | Us Synthetic Corporation | Polycrystalline diamond compact |
US9808910B2 (en) | 2006-11-20 | 2017-11-07 | Us Synthetic Corporation | Polycrystalline diamond compacts |
US20090057031A1 (en) * | 2007-08-27 | 2009-03-05 | Patel Suresh G | Chamfered edge gage cutters, drill bits so equipped, and methods of cutter manufacture |
US8061456B2 (en) * | 2007-08-27 | 2011-11-22 | Baker Hughes Incorporated | Chamfered edge gage cutters and drill bits so equipped |
US20090096057A1 (en) * | 2007-10-16 | 2009-04-16 | Hynix Semiconductor Inc. | Semiconductor device and method for fabricating the same |
US9643293B1 (en) | 2008-03-03 | 2017-05-09 | Us Synthetic Corporation | Methods of fabricating a polycrystalline diamond body with a sintering aid/infiltrant at least saturated with non-diamond carbon and resultant products such as compacts |
US20100059287A1 (en) * | 2008-09-05 | 2010-03-11 | Smith International, Inc. | Cutter geometry for high rop applications |
US8783387B2 (en) * | 2008-09-05 | 2014-07-22 | Smith International, Inc. | Cutter geometry for high ROP applications |
US8887839B2 (en) | 2009-06-25 | 2014-11-18 | Baker Hughes Incorporated | Drill bit for use in drilling subterranean formations |
US20100326742A1 (en) * | 2009-06-25 | 2010-12-30 | Baker Hughes Incorporated | Drill bit for use in drilling subterranean formations |
US9957757B2 (en) | 2009-07-08 | 2018-05-01 | Baker Hughes Incorporated | Cutting elements for drill bits for drilling subterranean formations and methods of forming such cutting elements |
US8978788B2 (en) | 2009-07-08 | 2015-03-17 | Baker Hughes Incorporated | Cutting element for a drill bit used in drilling subterranean formations |
US8757299B2 (en) | 2009-07-08 | 2014-06-24 | Baker Hughes Incorporated | Cutting element and method of forming thereof |
US9816324B2 (en) | 2009-07-08 | 2017-11-14 | Baker Hughes | Cutting element incorporating a cutting body and sleeve and method of forming thereof |
US10309157B2 (en) | 2009-07-08 | 2019-06-04 | Baker Hughes Incorporated | Cutting element incorporating a cutting body and sleeve and an earth-boring tool including the cutting element |
US20110031031A1 (en) * | 2009-07-08 | 2011-02-10 | Baker Hughes Incorporated | Cutting element for a drill bit used in drilling subterranean formations |
US20110023377A1 (en) * | 2009-07-27 | 2011-02-03 | Baker Hughes Incorporated | Abrasive article and method of forming |
US8500833B2 (en) | 2009-07-27 | 2013-08-06 | Baker Hughes Incorporated | Abrasive article and method of forming |
US9744646B2 (en) | 2009-07-27 | 2017-08-29 | Baker Hughes Incorporated | Methods of forming abrasive articles |
US10012030B2 (en) | 2009-07-27 | 2018-07-03 | Baker Hughes, A Ge Company, Llc | Abrasive articles and earth-boring tools |
US9174325B2 (en) | 2009-07-27 | 2015-11-03 | Baker Hughes Incorporated | Methods of forming abrasive articles |
US10301882B2 (en) | 2010-12-07 | 2019-05-28 | Us Synthetic Corporation | Polycrystalline diamond compacts |
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US20220003047A1 (en) * | 2018-11-07 | 2022-01-06 | Halliburton Energy Services, Inc. | Fixed-cutter drill bits with reduced cutting arc length on innermost cutter |
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USD911399S1 (en) | 2018-12-06 | 2021-02-23 | Halliburton Energy Services, Inc. | Innermost cutter for a fixed-cutter drill bit |
US11655681B2 (en) | 2018-12-06 | 2023-05-23 | Halliburton Energy Services, Inc. | Inner cutter for drilling |
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Also Published As
Publication number | Publication date |
---|---|
GB9508892D0 (en) | 1995-06-21 |
EP0741228A2 (en) | 1996-11-06 |
EP0741228A3 (en) | 1997-11-19 |
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